SpringBoot配置文件

 一、参数配置化

1.properties配置

#阿里云oss配置
aliyun.oss.endpoint=https://oss-cn-beijing.aliyuncs.com
aliyun.oss.bucketName=hzleadnews-01

2.@Value属性注入

    @Value ( "${aliyun.oss.endpoint}" )
    private String endpoint ;
    @Value ( "${aliyun.oss.bucketName}" )
    private String bucketName ;

二、yml配置文件

1.yml与其他配置文件比较

 2.yml基本语法

3.spring-boot中的yml配置

#数据库连接信息
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/tlias
    username: lyx
    password: 123456
    #配置文件上传
  servlet:
    multipart:
      max-file-size: 10MB
      max-request-size: 100MB
#Mybatis配置
mybatis:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
    map-underscore-to-camel-case: true
#阿里云OSS配置
aliyun:
  oss:
    endpoint: https://oss-cn-beijing.aliyuncs.com
    bucketName: hzleadnews-01

三、@ConfigurationProperties属性注入

        自动注入属性值

@ConfigurationProperties 自动注入配置文件中的前缀

1.AliOSSPropertis实体类

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
 
@Data
@Component
@ConfigurationProperties(prefix ="aliyun.oss")
public class AliOSSPropertis {
    private String endpoint ;
    private String bucketName ;
}

2.AliOSSUtils工具类

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.auth.CredentialsProviderFactory;
import com.aliyun.oss.common.auth.EnvironmentVariableCredentialsProvider;
import com.aliyuncs.exceptions.ClientException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
import java.io.*;
import java.util.UUID;
 
/**
 * 阿里云 OSS 工具类
 */
 
 
public class AliOSSUtils {
//    @Value ( "${aliyun.oss.endpoint}" )
//    private String endpoint ;
//    @Value ( "${aliyun.oss.bucketName}" )
//    private String bucketName ;
    @Autowired
    private AliOSSPropertis aliOSSPropertis;
 
 
 
 
 
 
 
    /**
     * 实现上传图片到OSS
     */
    public String upload(MultipartFile file) throws Exception {
        //获取OSS参数
        String endpoint = aliOSSPropertis.getEndpoint ();
        String bucketName = aliOSSPropertis.getBucketName ();
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // 获取上传的文件的输入流
        InputStream inputStream = file.getInputStream();
 
        // 避免文件覆盖
        String originalFilename = file.getOriginalFilename();
        String fileName = UUID.randomUUID().toString() + originalFilename.substring(originalFilename.lastIndexOf("."));
 
        //上传文件到 OSS
        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);
        ossClient.putObject(bucketName, fileName, inputStream);
 
        //文件访问路径
        String url = endpoint.split("//")[0] + "//" + bucketName + "." + endpoint.split("//")[1] + "/" + fileName;
        // 关闭ossClient
        ossClient.shutdown();
        return url;// 把上传到oss的路径返回
    }
 
}

3.解决警告

1.要引入的依赖

<dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-configuration-processorartifactId>
        dependency>

2.引入依赖后配置yml文件时会有提示

4.与@Value属性注入的区别